<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
</head>
<body>
<div id="app">
    {{ message }}
</div>
<div id="app-2">
  <span v-bind:title="message">
    鼠标悬停几秒钟查看此处动态绑定的提示信息！---绑定信息v-bind
  </span>
</div>
<div id="app-3">
  <p v-if="seen">现在你看到我了--绑定判断</p>
</div>
<div id="app-4">
  <ul>
    <li v-for="todo in todos">
      {{ todo.text }}
    </li>
  </ul>
</div>
<script>
    var app = new Vue({
        el: "#app",
        data: {
            message: "hello Vue!"
        }

    })
    var app2 = new Vue({
        el: '#app-2',
        data: {
            message: '页面加载于 ' + new Date().toLocaleString()
        }
    })
    var app3 = new Vue({
  el: '#app-3',
  data: {
    seen: true
  }
})
    var app4 = new Vue({
  el: '#app-4',
  data: {
    todos: [
      { text: '学习 JavaScript' },
      { text: '学习 Vue' },
      { text: '整个牛项目' }
    ]
  }
})
</script>
</body>
</html>